Suppose that the height (in centimeters) of a candle is a linear function of
the amount of time (in hours) it has been burning.
Let x be the amount of time in hours
Let y be the heoght of a candle in centimeters
The two points are then as (9,24.5) and (23,17.5).
Now plug in x=21, we get
Thus the height of the candle after 21 hours is 18.5 centimeters.
Answer:
Step-by-step explanation:
1) Use point-slope formula to find the slope-intercept form (or y = mx + b form) of the equation. m represents the slope, and
and
represent the x and y values of a point the line intersects. So, substitute
for m, -4 for
, and 7 for
. Then, simplify and isolate y on the left side like so:
The circumference of the top of the cake is in.
It sounds like the baker is trying to line the circumference with cherriesto fit as many as possible along the border, like in the picture I've attached below.
This comes down to dividing the cake's circumference by the diameter of each cherry:
or about 39 cherries, making the answer D.
